Common cold, also known simply as a cold, is a viral infectious disease of the upper respiratory tract that primarily affects the nose. The throat, sinuses, and voice box may also be affected. Signs and symptoms may begin less than two days following exposure. They include coughing, sore throat, runny nose, sneezing, headache, and fever. People usually recover in seven to ten days. Some symptoms may last up to three weeks. In those with other health problems, pneumonia may occasionally develop. (source)